Officials identified the former detainee through a propaganda video for the terrorist group.

Al Qosi in 2010 pled guilty to charges of conspiracy and providing material support to Al Qaeda.

He was transferred to his home country of Sudan after two years of cooperating with prosecutors.

“This is not the first time a former Guantanamo detainee has taken on a leadership role in Al Qaeda, and it is now a trend based on the data,” chief intelligence correspondent Catherine Herridge reported on "America's Newsroom."

This particular case stands out “because Al Qaeda in Yemen is the most active and able to hit the United States,” said Herridge.

Catch Catherine’s special report, including footage from inside Guantanamo Bay’s Camp X-Ray, in the video above.